not that bad if it's the first game you've made ^^
Keep it up, add scores and health or something :D
(idk, but that's probably very hard, but it'll make the game much better!)
Really good, but it's not the first tic-tac-toe out there ^^
Cool with all the options like 3x3-5x5 and easy, normal etc.
Kinda easy to beat the computer tho, keep it up!